681423420 has 24 divisors (see below), whose sum is σ = 1907985744. Its totient is φ = 181712896.

The previous prime is 681423409. The next prime is 681423439. The reversal of 681423420 is 24324186.

681423420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5678469 + ... + 5678588.

It is an arithmetic number, because the mean of its divisors is an integer number (79499406).

Almost surely, 2^681423420 is an apocalyptic number.

681423420 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

681423420 is an abundant number, since it is smaller than the sum of its proper divisors (1226562324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

681423420 is a wasteful number, since it uses less digits than its factorization.

681423420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11357069 (or 11357067 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 681423420 is about 26104.0881855697. The cubic root of 681423420 is about 879.9790886904.

The spelling of 681423420 in words is "six hundred eighty-one million, four hundred twenty-three thousand, four hundred twenty".